BOTANICAL BUBJECT; 



231 



The sequence of all this appears to be sufficiently logical. 



In one cherry tree I found that the glands are sometimes close 

 to the base of the blade, sometimes on the middle of the petiole. 

 Sometimes there are from one to four glands, and at other times 

 they are absent, or are only to lie found on the lo^yer margin of 

 the blade, or higher up. 



The teeth-glands in these and similar plants \yould appear to 

 correspond to arrested terminal buds of the teeth, the latter being, 

 as I think, arrested branches.* 



In the transformation of a leaf into a stamen, it appeared to me 

 not impossible that the two anther cells might correspond to, or be 

 homologous with, the gland-like bodies in the cherry leaf and 

 others, resulting from the amalgamation of the teeth-glands of the 

 transformed leaf-blade, the blade itself being suppressed. Indeed, 

 this notion would, I think, find support when we examine the 

 reversion of stamen to leaf, such as is seen in Fig. 83. 



The teeth-glands can be seen to perfection in the young cherry 

 leaf. If seyeral leayes are examined, one becomes " morally 

 conyinced " that the larger glands on the petiole can only be the 

 fusion of the teeth-glands of the two suppressed leaflets.^ 



Fig. 84. Bud-scale of Cherry tree (mag.) : (a a) stipules, (6) undeveloped 

 leaf-blade, (c, c) tooth-glands fused into larger glands. 



* Vide Chapter on Stems and Cladophyls. 



t Suppressed leaflets are also represented by glands on the midrib of the 

 leaf of Erythrinq Indica Piircelli and others. 



